[Feature Request]: Add visual indicators for inputs without wires, when the wires are hidden.

### Is there an existing issue for this?

- [X] I have searched the existing issues and checked the recent builds/commits

### What would your feature do ?

Now that there is a button to hide the wires ( https://github.com/Comfy-Org/ComfyUI_frontend/issues/1063 ), people will do this more often.

So it may be worth adding a visual indicator when an input has no wires.

### Proposed workflow

When wires are hidden, the input dots with connections could have a different shape.

I didn't think much about the shape. This is just an example:


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An alternative would be showing the different shape on the inputs without wires ( e.g. a circle )
You could reuse this shape ( that is now replaced ).

I think this would probably look better than the example above.


### Additional information

_No response_